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The Percona Toolkit development team is proud to announce a new major version: 2.0. Beginning with Percona Toolkit 2.0, we are overhauling, redesigning, and improving the major tools. 2.0 tools are therefore not backwards compatible with 1.0 tools, which we still support but will not continue to develop.

New in Percona Toolkit 2.0.1 is a completely redesigned pt-table-checksum. The original pt-table-checksum 1.0 was rather complex, but it worked well for many years. By contrast, the new pt-table-checksum 2.0 is much simpler but also much more efficient and reliable. We spent months rethinking, redesigning, and testing every aspect of the tool. The three most significant changes: pt-table-checksum 2.0 does only --replicate, it has only one chunking algorithm, and its memory usage is stable even with hundreds of thousands of tables and trillions of rows. The tool is now dedicated to verifying MySQL replication integrity, nothing else, which it does extremely well.

In Percona Toolkit 2.0.1 we also fixed various small bugs and forked ioprofile and align (as pt-ioprofile and pt-align) from Aspersa.

If you still need functionalities in the original pt-table-checksum, the latest Percona Toolkit 1.0 release remains available for download. Otherwise, all new development in Percona Toolkit will happen in 2.0.